Tool for locking nuts.



W. M; JENKINS & E. R. WARD.

TOOL FOR LOOKING NUTS.

APPLIOATION FILED JUNE 23,1911

Patented M31. 12, 1912.

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WILLIAM M. JENKINS, OF PITTSBURGH, PENNSYLVANIA, AND EDMUND R. WARD, OFHARTFORD, CONNECTICUT.

TOOL FOR LOOKING NUTS.

To all whom it may concern:

Be it known that we, \ViLLIAM M. JEN- 'KINS, residing at Pittsburgh,county of Allegheny and State of Pennsylvania, and En- MUND R. \Vann,residing at Hartford, m the county of Hartford and State of Connectlcut,citizens of the United States, have in vented or discovered certain newand useful Improvements in Tools for Lockmg Nuts, of which improvementsthe following is a specification.

The invention described herein has for its object the provision of atool whereby a por tion of a nut may be displaced and forced intoengagement with the bolt on which the nut is screwed.

The invention is hereinafter described and claimed.

In the accompanying drawing forming a part of this specification Figure1 is a view showing the tool in elevation and applied to the nut andbolt which are shown in the section; Fig. 2 is a similar Viewillustrating the operation of the tool and Fig. 3 is a view at rightangles to Figs. 1 and 2.

A most efficient lock for preventing the jarring loose of a nut isformed by forcing a small tongue of metal of the nut into a groovedrecess 0r slot in the bolt. It is preferred to slot the threaded end ofthe bolt for such a distance relative to the position the nut 2 willoccupy that its upper surface will be outside the inner end of the slotas shown in Figs. 1 and 2.

The tool consists of a body portion 3 having at its lower end a spur 4and a laterally extending wing 5 which will serve to insure the properplacing of the spur both as regards alinement with the slot in the boltand also as regards the desired amount of metal which is to be displacedand forced into the slot. It is preferred that the lower portion of thetool should be wedge shaped as shown in Fig. 3 the thickness of the edgebeing a little less than the width of the slot, so that the end of thetool will enter the latter. The transverse length of the tool measuringfrom the swaging spur 4 will depend upon the internal diameter of thenut. In all cases such length should be equal to such internal diameterplus the distance from the internal periphery of the point at which thespur should engage the nut to insure the displacement of the desiredamount of metal.

more fully Specification of Letters Patent.

Application filed June 23, 1911 Patented Mar. 12, 1912. Serial No.634,976.

The wing 5 made to extend a little beyond the spur so that it may enterthe slot in the bolt before the spur bears in the nut, and the edge a ofthe wing opposite the spur is made straight so that it may act as aguide by hearing against the threads of the nut when the wing isinserted in the slot in the bolt. As will be readily understood thesides of the wing when placed in the slot will bear against the sidewalls of the slot and in that way insure that the spur will bear on topof the nut in line with the slot, and the edge a of the wing bearingagainst the threads, will determine the position of the spur relative tothe inner periphery of the nut, so that for given sizes of nut and bolt,a sufficient amount of metal will be displaced by the spur to form anefficient lock.

By reason of carelessness in manufacture or the wear of taps or dies,the nuts will fit loosely on the bolts, and in order to cause the boltsto fit tightly in the nut, it is pre ferred to make the wing wedgeshaped so that when the spur is driven into the nut to form the lockingtongue, the bolt itself is spread by the wedging action of the wing andwill be held in such condition by the tongue of metal forced in betweenthe spread or opened portions of the bolt.

lVe are aware that nut locking tools having a middle portion adapted toenter the slot of a bolt, and a spur on each side of such middle areold. But the middle portion of such tools is narrower than the bolt andhence will determine the position of the tool in one plane only. Inpractice it is found that the workman is frequently careless in placingthe tool so that one spur will displace an insufficient amount of metaland the other spur be so far froin the inner periphery of the nut thatno metal will be displaced, or one spur may be forced between the nutand bolt defacing the threads of both.

We claim herein as our invention 1. A nut locking tool comprising ashank, a spur, and a guide wing extending laterally in the plane of thespur and having a guide edge adapted to bear against the inner peripheryof the nut the distance between such edge and the spur being equal tothe internal diameter of the nut plus the radial thickness of metal tobe displaced.

2. A nut locking tool comprising a shank, a spur and a Wedge shaped Wingex- In testimony whereof, We have hereunto tending laterally in thiaplane of the spur set our hands.

and havin a guide e ge adapted to bear against thg inner periphery ofthe nut the 5 distance between such edge and the spur being equal to theinternal diameter of the nut Witnesses: plus the radial thickness ofmetal to be dis- W. J. SNODGRASS, placed. THOMAS JOYCE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

